#include <math.h>

#define EXPR(x) (fabs(x))
double simplefun(double x) { return EXPR(x); }

#define EXPR2(x) (x = 0.0)
double simplefun2(double x) { return EXPR2(x); }

#define EXPR3(x) (x = -x)
double simplefun3(double x) { return EXPR3(x); }
